They were called “Kanakas“. Growing up in Bundy I was taught that they were “workers”. Wikipedia claims “Of the more than 60,000 Islanders recruited from 1863, the majority were to be “repatriated” (that is, deported) by the Australian Government between 1906-08 under the Pacific Island Labourers Act 1901 legislation prompted by the White Australia policy.”

Or, as the above story suggests, just murdered and thrown into mass graves.